A weak acid has a pKa of 5.857. Calculate the pH of a solution in which the ratio of the concentrations of acid anion to undissociated anion ([A-]/[HA]) equals 7.555.
Ka = [H][A]/[HA] for a monoprotic acid
pka =-logKa = -log[H][A]/[HA] = pH - log[A]/[HA]
[A] =x amount of acid dissociated
[HA] = U-x U is original amount of the acid before dissociation occurs
U-x is also the ...
This solution is provided in approximately 275 words. It calculates step-by-step the amount of acid dissociated and undissociated, and calculates pH.